broken glassware

This morning while washing dishes (a fair number had accumulated as the result of general busyness of recent days) I was scrubbing a small glass bowl and I broke it with my bare hands. The bowl just cracked somewhat down the middle and left me holding two bowl halves of approximately the same size, one in each hand. I inspected the fault line to see whether I could assign fault to some original and inherent weakness in structure, but had no idea what I should look for with just my eyes. The last time I broke a dish, I think I had put down a glass too hard and caused it to crack. Because I like to read into things I decided that destruction of dinnerware means I need to be a more careful, sensitive, or gentle person. Though I'm not yet sure how to operationalize any of this.